Sol-gel derived Li+-doped poly(epsilon-caprolactone)/siloxane biohybrid electrolytes

resumo

Electrolytes based on a poly(is an element of-caprolactone) (PCL)/siloxane organic/inorganic host framework doped with lithium triflate (LiCF3SO3) were synthesised through the sol-gel process. In this biohybrid matrix short PCL chains are covalently bonded via urethane linkages to the siliceous network. Samples with salt composition n (molar ratio of PCL repeat units per Li+ ion) ranging from infinity to 0.5 were investigated. All the ormolyte materials analyzed are amorphous. Xerogels with n > 0.5 are thermally stable up to about 300 degrees C. The most conducting ormolyte of the series is that with n = 0.5 (1.6x10(-7) and 3.2x10(-5) Omega(-1) cm(-1) at 25 and 100 degrees C, respectively). This sample is electrochemically stable between -1 and 6 V versus Li+.

palavras-chave

ORGANICALLY MODIFIED SILICATES; ION-CONDUCTING ORMOLYTES; STATE LITHIUM BATTERIES; EPSILON-CAPROLACTONE; HYBRID; POLYCAPROLACTONE; BIODEGRADABILITY; DEGRADABILITY; COPOLYMERS; COMPOSITE

categoria

Electrochemistry

autores

Nunes, SC; Bermudez, VD; Silva, MM; Smith, MJ; Morales, E; Carlos, LD; Ferreira, RAS; Rocha, J

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